Former U.S. Sen. Rick Santorum and U.S. Rep. Michele Bachmann have made commitments to sign pledges in support of traditional marriage sought by the Family Leader, an Iowa group that backs Christian conservative social values.

Santorum was the first presidential candidate to contact the Family Leader after the organization announced its candidate pledge document on Thursday, according to a statement issued by the Pleasant Hill-based group. Bachmann also contacted the Family Leader and was the first candidate to send her signed document to the organization, officials said.

The Family Leader is asking all presidential candidates to sign the pledge, which includes support of personal fidelity to his or her spouse, appointing “faithful constitutionalists” as judges, opposition to any redefinition of marriage, and prompt reform of uneconomic and anti-marriage aspects of welfare policy, tax policy, and divorce law. The Marriage Vow also outlines support for the legal advocacy for the Defense of Marriage Act (DOMA), humane efforts to protect women and children, rejection of Sharia Islam, safeguards for all married and unmarried U.S. military personnel, and commitment to downsizing government and the burden upon American families.

Bob Vander Plaats, the Family Leader’s chief executive officer, said the signing of the pledge will be a requirement for future endorsement by the organization. He said the Family Leader plans to make public the candidates’ responses to the request for marriage pledges prior to the Ames Straw Poll on Aug. 13.